N. Vietnam, prov. Cao Bang, distr. Tra Linh, municipality Quoc Toan, vicinities of Lung Tao village (N 22°45′ E 106°19′), about 12 km from Cao Bang town to the NNE. Primary semideciduous open broadleaved forest on steep slopes and bluffs of remnant limestone ridge at 600-800 m alt. Epilite herb with pendant shoots up to 30 cm lg on vertical cliffs. Common.
CBL 1256 14 Dec. 1998
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)
Collectors: N.T.Hiep, N.Q.Binh, P.K.Loc, N.X.Tam, Averyanov L.